JP2008170713A - Binoculars - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a diopter from changing after finishing adjusting a diopter difference. <P>SOLUTION: After adjusting the diopter difference, a focusing knob 40 is pushed into, then, an operation knob part 53b is covered by the focusing knob 40, consequently, the operation knob part 53b is prevented from being erroneously touched by a user's hand. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to binoculars.

2. Description of the Related Art Conventionally, binoculars have various adjustment mechanisms such as a focus adjustment mechanism and a diopter difference adjustment mechanism in addition to the left and right lens barrels constituting two telephoto optical systems. The diopter difference adjusting mechanism adjusts the diopter difference between the left and right eyes of the user, and the left and right telephoto optical systems are focused by the focus adjusting mechanism in a state where the diopter difference is adjusted. Once the left and right diopter difference is adjusted, observation can be performed by simply focusing the two telephoto optical systems at the same time, as long as the user does not change.
Utility Model Registration No. 2592717

  However, there is a risk that the diopter difference will be lost if the operation part of the diopter difference adjusting mechanism that has been adjusted once by mistake while using the binoculars. If the diopter difference goes wrong, the diopter difference between the left and right eyes must be adjusted again, and the observation must be interrupted.

  The present invention has been made in view of such circumstances, and the problem is that the diopter can be prevented from changing after the diopter difference is adjusted.

  In order to solve the above-described problem, the invention according to claim 1 is a diopter that applies left and right lens barrels constituting a telescope optical system, a diopter adjustment mechanism that adjusts the diopter, and a diopter that applies operating force to the diopter adjustment mechanism An adjustment ring and diopter adjustment ring operation restriction means for restricting whether the operation of the diopter adjustment ring is enabled or disabled are provided.

  According to the present invention, it is possible to prevent the diopter from changing after adjusting the diopter difference.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 is a conceptual diagram showing a fracture surface of binoculars according to an embodiment of the present invention, FIG. 2 is a partially enlarged view of FIG. 1, FIG. 3 is a view of a lead ring male viewed from the internal gear side, and FIG. FIG. 5 is a conceptual diagram showing a fracture surface of binoculars. 1 shows a state when the focus knob 40 is pushed in, FIG. 2 shows a state when the focus knob 40 is pulled out, and FIG. 5 shows a state when the focus knob 40 is at an intermediate position.

  The binoculars include left and right lens barrels 10 and 20 constituting a telescope optical system, a connecting portion 30 that connects both the lens barrels 10 and 20, and a focus knob 40 that applies an operating force to the focus mechanism.

  The left and right lens barrels 10 and 20 can be rotated by a predetermined angle about the axis MA so that the eye width can be adjusted. The right lens barrel 10 has a focusing lens 11 and an erecting prism 12. The left lens barrel 20 includes a focusing lens 21 and an erecting prism (not shown).

  The focusing lens frame 13 that holds the focusing lens 11 is connected to the first focus bar 51 via a connecting pin 14. The first focus bar 51 is movable along the focus axis FA (see FIG. 1) (the shaft cannot be rotated). The focus axis FA and the optical axes L1 and L2 are parallel. A female screw 51a is formed on the first focus bar 51, and a male screw 52a formed at one end of the second focus bar 52 is screwed into the female screw 51a.

  The second focus bar 52 is movable along the focus axis FA and is rotatable about the focus axis FA. The relative positions of the first focus bar 51 and the focusing lens frame 13 in the optical axis L1 and L2 directions are determined according to the screwing amount of the first focus bar 51 and the second focus bar 2. The second focus bar 52, the first focus bar 51, the connecting pin 14, and the focusing lens frame 13 constitute a diopter adjustment mechanism.

  A gear 52 b is formed at the other end of the second focus bar 52. The gear 52b meshes with an internal gear 53a formed on the inside of the diopter adjustment ring 53 (operation unit main body 53c). The diopter adjustment ring 53 includes a cylindrical operation portion main body 53c and an operation knob portion 53b provided at one end of the main body 53c. The diopter adjustment ring 53 can rotate around the axis MA, but cannot move in the direction of the optical axes L1 and L2.

  A gear is not formed on the other end of the left second focus bar 52. Therefore, the other end of the left second focus bar 52 is not meshed with an internal gear 53 a formed inside the diopter adjustment ring 53.

  A groove 52c extending in the circumferential direction is formed at the other end of the second focus bar 52. The convex portion 54a of the lead ring knife 54 is engaged with the groove 52c. The lead ring knife 54 can move in the directions of the optical axes L1 and L2, but cannot rotate about the machine axis MA.

  The lead screw 54 b of the lead ring female 54 meshes with the lead screw 55 b of the lead ring male 55. The lead ring male 55 cannot move in the direction of the optical axes L1 and L2, but can rotate inside the lead ring female 54 around the axis MA. A spur gear 56 having a gear 56a formed on the outer periphery is provided on the end face of the lead ring male 55 (see FIG. 3). The lead ring male 55 is fixed to the intermediate cylinder 57.

  As the diopter adjustment ring operation restricting means for restricting the operation of the diopter adjustment ring 53, in this embodiment, a focus operation unit including a focus knob 40 and a rotary shaft 41 is employed. The focus knob 40 is arranged coaxially with the diopter adjustment ring 53. The focus knob 40 can be rotated by the intermediate cylinder 57 and is provided integrally with a rotary shaft 41 supported by the intermediate cylinder 57 so as to be movable in the optical axis L1 and L2 directions. Therefore, the focus knob 40 can rotate about the machine axis MA and can move in the direction of the optical axes L1 and L2. A retaining screw 42 is screwed onto the tip of the rotating shaft 41.

  The focus knob 40 is provided with an internal gear 58 having a gear 58a that meshes with the gear 56a of the spur gear 56 (see FIG. 4). By moving the focus knob 40 along the axis MA, the spur gear 56 and the internal gear 58 can be engaged with each other, or the engagement can be released.

  A plurality (three places) of concave portions 57a are formed on the inner peripheral surface of the intermediate cylinder 57, and the O-ring 41a fitted in the concave portion (groove portion) provided on the outer peripheral surface of the rotating shaft 41 is dropped into the concave portion 57a. be able to. The recess 57a and the O-ring 41a constitute a click mechanism (position holding mechanism). By this click mechanism, the focus knob 40 can be positioned at three positions in the optical axis direction.

  Next, a procedure for adjusting the focus of the binoculars will be described. Note that the eye width adjustment has already been performed.

  First, in order to adjust the diopter difference between the right and left of the user, the focus knob 40 is pulled out to release the meshing between the spur gear 56 and the internal gear 58 (see FIG. 2). At this time, since the lead ring male 55 for moving the left and right focusing lenses 11 and 21 and the focus knob 40 are not connected, the lead ring male 55 does not rotate even if the focus knob 40 is rotated. The focal lenses 11 and 21 do not move.

  When the meshing between the spur gear 56 and the internal gear 58 is released, the operation knob portion 53b is exposed. When the operation knob 53b is operated, the diopter adjustment ring 53 rotates. The rotational force of the diopter adjustment ring 53 is transmitted to the second focus rod 52 via the internal gear 53a and the gear 52b, and the second focus rod 52 rotates (the second focus rod 52 is connected to the lead ring knife 54). The movement in the optical axis direction is restricted by the engagement). At this time, the first focus bar 51 and the focusing lens frame 13 move in the directions of the optical axes L1 and L2 in accordance with the screwing amount between the first focus bar 51 and the second focus bar 52. As a result, the diopter difference between the left and right eyes of the user is adjusted.

  Thereafter, the focusing lenses 11 and 21 are moved for focusing.

  First, the focus knob 40 is pushed in from the state shown in FIG. 2 to engage the spur gear 56 and the internal gear 58 (see FIG. 1). The focus knob 40 and the lead ring male 55 are connected via a spur gear 56 and an internal gear 58. At this time, since the operation knob portion 53b is completely covered with the focus knob 40, the operation knob portion 53b is not accidentally touched, and the previously set diopter difference is not changed.

  When the focus knob 40 is rotated, the lead ring male 55 is rotated and the lead ring female 54 is moved in the optical axis direction. As the lead ring knife 54 moves in the direction of the optical axes L1, L2, the left and right second focus rods 52, the first focus rod 51, and the focusing lens frame 13 integrally move in the directions of the optical axes L1, L2. . At this time, since the second focus bar 52 does not rotate, the relative distance between the first focus bar 51 and the second focus bar 52 in the direction of the optical axes L1 and L2 does not change.

  As a result, the focusing lenses 11 and 21 move in the directions of the optical axes L1 and L2, and the left and right telephoto optical systems are simultaneously focused on the observation target.

  According to this embodiment, after the diopter difference is adjusted, the focus knob 40 is pushed in so that the operation knob portion 53b cannot be touched, so that the diopter changes after the diopter difference is adjusted. Can be prevented. In addition, since the click mechanism is employed, the focus knob 40 can be reliably held at a predetermined position.

  As shown in FIG. 5, even when the focus knob is set to the intermediate position, a part of the operation knob 53b is covered by the focus knob 40, so that it becomes difficult to accidentally touch the operation knob 53b, and the diopter difference is reduced. It is possible to prevent the diopter from changing after the adjustment.

  In the above embodiment, the focus knob 40 is used as the diopter adjustment ring operation restricting means. However, the operation knob portion 53b is used by using a member (not shown) different from the focus knob 40 as the diopter adjustment ring operation restricting means. So that the operation knob 53b is not accidentally touched.

  Further, when the diopter adjustment mechanism has a rotation shaft, it may include a lock mechanism that locks the rotation of the rotation shaft. As this locking mechanism, a rotating shaft may be sandwiched between gripping members to prevent the rotating shaft from rotating.

  Further, when a focus operation unit is also provided, the focus operation unit may be provided coaxially with the diopter adjustment mechanism, and the axis of the diopter adjustment mechanism may be prevented from rotating by moving the focus operation unit in the axial direction.

  Further, in the present embodiment, the diopter adjustment mechanism and the focus mechanism are provided in the connecting portion 30, but the positions where these are provided are not limited to the connecting portion 30, and may be the lens barrels 10 and 20 or the periphery thereof. .

FIG. 1 is a conceptual diagram showing a fracture surface of binoculars according to an embodiment of the present invention. FIG. 2 is a partially enlarged view of FIG. FIG. 3 is a side view of the lead ring male viewed from the internal gear side. FIG. 4 is a side view of the focus knob as viewed from the spur gear side. FIG. 5 is a conceptual diagram showing a fracture surface of binoculars.

Explanation of symbols

  10, 20: Lens barrel, 13: Focusing lens frame, 14: Connection pin, 30: Connection part, 40: Focus knob (focus operation part), 41: Rotating shaft, 41a: O-ring, 53: Diopter adjustment ring 53b: operation knob portion, 53c: operation portion main body, 57a: recess.

Claims (6)

The left and right barrels that make up the telescope optical system;
A diopter adjustment mechanism for adjusting diopter,
A diopter adjustment ring for giving an operating force to the diopter adjustment mechanism;
A binoculars comprising: a diopter adjustment ring operation restricting means for restricting whether the operation of the diopter adjustment ring is validated or invalidated. The diopter adjustment ring has a cylindrical operation part main body and an operation knob part provided at one end of the main body,
The diopter adjustment ring operation restricting means is disposed coaxially with the diopter adjustment ring, and can move along an axis to cover at least a part of the operation knob portion. Binoculars.   The binoculars according to claim 1, wherein the diopter adjustment ring operation restriction means is a focus operation unit.   The binoculars according to claim 3, wherein the diopter adjusting ring operation restricting means has a position holding mechanism capable of holding the focus operating portion at a plurality of arbitrary positions in the optical axis direction.   The binoculars according to claim 4, wherein the position holding mechanism is a click mechanism.   The two lens barrels are connected and extended from the left and right lens barrels, and a focusing mechanism for moving the focusing lens in the left and right lens barrels in the direction of the optical axis is provided inside each of the lens barrels. The binoculars according to claim 1, further comprising a connecting portion.

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